Ancient Roman & English: Roman family name which was possibly derived from Latin cassus “empty, vain”. This name was borne by several early saints. In modern times, it was the original first name of boxer Muhammad Ali (1942-), who was named after his father Cassius Clay, who was himself named after the American abolitionist Cassius Clay (1810-1903). (Behindthename.com)
Popularity in 2008: #945 (USA) Cassius Clay was an abolitionist and the birth name of Muhammad Ali; also a Shakespearean name with the feel of antiquity that is coming into fashion. It was recently chosen for his son by Bobby Brown.Variations:Casseus, Cassio, Casshus, Casius. (nameberry.com)
New Zealand Baby Names 
Laura said,
January 15, 2010 @ 4:35 am
Cassius is a great name, I like it alot!
babynamelover said,
January 15, 2010 @ 6:19 am
Me too 🙂 Thanks for commenting 🙂
Sophia said,
January 15, 2010 @ 6:20 am
Love this name 🙂
I like it better spelt with a K though.
babynamelover said,
January 15, 2010 @ 6:43 am
I think we had this conversation before! 🙂
Sophia said,
January 16, 2010 @ 1:31 am
I think so too 🙂
Laura said,
January 16, 2010 @ 3:17 am
Nope I like it with a ‘c’. Why k?
babynamelover said,
January 16, 2010 @ 3:58 am
I like it with the C too 🙂
Sophia said,
January 17, 2010 @ 4:48 am
I’m not sure why, it just appeals to me more. I can understand that it also makes it looks kind of trashier. But I dunno, I just like it better.
babynamelover said,
January 17, 2010 @ 6:29 am
Fair enough 🙂
Sebastiane said,
January 16, 2010 @ 4:43 pm
I love the name Cassius, especially with the nickname Cash. I am surprised it isn’t more popular.
babynamelover said,
January 16, 2010 @ 9:08 pm
I’m surprised too is Cash in the USA top 100 for 2008 do you know? reminds me of the legendary Johnny Cash 🙂